Tack-feeding apparatus



Feb. 5 1924. 1,482,767

- J. SHLIEKR TACK FEEDING APPARATUS,

Filed May 11, 1923 MI!) I I! Jhven ?or,

Patented Feb. 5, i924.

STATES JOSEPH SHLIEKR, 0F HAVERHILL, MASSACHUSETTS.

TACK-FEEDING APPARATUS.

Application filed May 11, 3.923. Serial No. 638,206.

To all whom it may concern:

Be it known that I, JosErH SHLIEKR, a citizen of the United States, a resident of Haverhill, in the county of Essex and Commonwealth of Massachusetts, have invented an Improvement in Tack-Feeding Apparatus, of which the following is a specification.

In the operation of machines for performing the operation known a pulling over, in the manufacture of shoes, the lasting tacks, in a well known type of machine, are fed through a series of parallel downwardly inclined raceways to a separator plate, which is reciprocated at right angles thereto, so as to remove a single tack from each raceway and simultaneously deliver a tack to tubes which conduct the tacks to a position in which they are driven.

In machines of this character, difiiculty has been frequently encountered from the clogging of the tacks in the raceways, so that the first tacks therein will not always slide into a position to be removed by the separator with the result that a tack will not be driven at one or more points and the upper will not be properly secured.

The object of my invention is to provide automatic means whereby the delivery of a tack at the discharge end of each raceway will be assured under ordinary working conditions, and in this connection a further object is to provide an attachment of simple construction which may be readily applied to a form of pulling over machine now in general use.

I accomplish these objects in the manner hereinafter described and as illustrated in the accompanying drawing in which Fig. 1 is a plan view of a portion of a tack feeding apparatus for pulling over machine provided with an attachment embodying my invention.

Fig.2 is a similar view of the attachment on an enlarged scale.

Fig. 3 is a View similar to Fig. 2, showing the parts in a different position, and partly in horizontal section. 4

Fig. lis a'sectional view'at line aa of Fig. 5 is a side view of the attachment. In the drawing a commonform of tack feeding and separating mechanism is indicated, comprising a tack magazine 1,

from which lead the declining tack raceways 2, formed by slots in the frame. At-

initial position of Figs. 1 and 2 to its eX- treme position of Fig. 3 and during this movement the first tacks pass into slots 4: and the beaks 5 pass between the first and second tacks; The separator plate is returned to its initial position and if the apparatus is operating as intended, the second tacks will then rest against the edge of the separator plate, so that the above described operation may be repeated. In practice,

however, it has happened, with undesirable frequency, that the tacks become clogged in the raceways, or fail to slide down as intended, so that, at times a'tack will not have been I delivered into the position to be separated, at the beginning of the operative movement of the slide. I have discovered that if a sharp blow is struck the frame in which the raceways are formed, or parts directly in abutment therewith, tacks which have become clogged in the raceways will be dislodged and will slide down into position to be separated, and, in order that delivery of tacks to the separator may be assured, so that the upper will be secured at all points, such a blow should be struck the parts each time the separator is operated.

More specifically, my invention consists of means for accomplishing this result:

Pulling over machines of a certain type are usually provided with a cup 6, which surround the separator for the purpose of catching tacks, which sometimes fall by accident from the separator and raceways, and as a matter of convenience, I have utilized this cup as a means for supporting my attachment.

According to my invention, I provide a casing 8, which is slotted to receive an edge portion of the cup 6, and secure said casing on said edge portion by means of set screws '9 directly opposite one end of the separator slide. A pair of rods 10 are reciprocally mounted in the casing 8, to slide in line with the separator slide, and a circular head or hammer 12 is mounted on the end portions of said rods and securely comiected thereto. The space in the rear of the head 12 is chambered out to receive a portion of the head, and also a coiled spring 14, which is interposed between the bottom of said chamber and the inner end of said head, so that said spring 14 acts to push the head towards the end of the separator slide. A pair of dogs 15 are mounted to slide in chambers 16 in the casing, which open to the rods 10, the ends of said dog-s next said rods being tapered or beveled and each be ing adapted to bear on the surface of the corresponding rod and to engage in a beveled recess 17 therein. Springs 18 are arranged in the chamber 16- between said dogs 15 and adjusting screws 19, threaded in the chamber, so that said dogs: are constantly pressed in yielding engagement with the rods. An arm 20 is attached to the: rim of a flange 13, formed on the outer end of the head 12, and said arm has a longitudinal slot 21, through which a screw 22 extends, said screw being secured in the adjacent end of the separator slide 3.

The initial position of the parts is illustrated in Figs. 1, 2 and 5, in which position the rear end of the slide 3 is in abutment with the frame, and head 12 is in abutment with the front, or adjacent end of the slide, the screw 22 being located in the end of the slot 21 next the head 12. The slide 3 is then advanced to its extreme posit-ion and separates a tack from each raceway. By this movement the head 12 is pressed towards the casing 8 until its flange 13 is close to the side of the casing, in which position the dogs 15 will enter the recesses 17 and the spring 14 will be compressed. The parts will then be in the position of Fig. 3. The slide 3 is then returned to its initial position, but the frictional engagement of the dogs 15 with the rods 10, in the recess thereof, is such that the head 12 will be retained thereby in the position of Fig. 3 during the greater portion of this return movement. The length of the slot 21 is such that the screw 22, carried by the slide 3, engages the end thereof just before the slide reaches its initial position, and exerts a pull on the head 12 and positively moves the same until the rods 10 are moved sufficiently to press the dogs 15 back out of the recesses 17, and, when this occurs the frictional en gagement of the dogs with the rods will be entirely insufficient to restrain the action of the spring 14, which will move the head 12 rapidly towards the slide and, as the slide reaches its initial position, or instantly thereafter, the head will be caused to strike the front end of the slide a sharp blow at or immediately after the slide engages the frame at its rear end. Vibrations: caused in .the frame or the jarring effect thereon caused, by the impact of the head against the slide, which is in abutment with the frame, will jar the raceway and dislodge any tacks which may, for some cause, have lodged therein at some point more or less remote from the separator, so that they will slide down into position to be removed by the separator slide on the next operation. It follows therefore that the metal guide ways will sharply vibrate at the end of each reciprocating movement of the separator, so that a constant supply of tacks to the separator will be assured.

I claim 1. In a machine of the character described, a frame having a declining tack raceway therein, a tack separator reciprocally movable transversely of the raceway at its lower end, a striker movable to and from an engaging position, means to move the striker to a disengaged position as the separator is moved operatively, means to retain the striker in said disengaged position during the return movement of the separator, and means to move the striker to engaging position to jar the raceway at the end of said return movement.

2. In amachine of the character described, a frame having a declining tack raceway therein and a tack separator reciprocally movable transversely of the raceway at its lower end, a striker movable between striking and a retracted position, a spring arranged to actuate the striker to jar the raceway when released, means controlled by the movement of said separator to move the striker to its retracted position during the operative movement of the separator, means to retain the striker in its retracted position against the spring action thereon during the return movement of the separator and means to release said striker at the end of said return movement.

3. In a machine of the character described, a frame having a declining tack raceway therein and a tack separator reciprocally movable transversely of the raceway at its lower end, a striker movable to and from striking position, a spring arranged to actuate the striker to ar the raceway when released, means controlled by the movement of said separator to move the striker to a retracted position during the operative movement of the separator, a friction device arranged to retain the striker in said retracted position against the action of said spring and means to disengage the striker from said friction device to permit the spring to operate the striker.

4:. In a machine of the character described, a frame having a declining tack raceway therein and a tack separator reciprocally movable transversely of the raceway at its lower end, a spring actuated striker head mounted for reciprocal movement in the direction of movement of the separator and arranged to be engaged by said separator during the operative movement thereof, to move the head to a retracted position against the action of its spring, means to retain the head in its retracted position during a portion ofthe return movement of the separator and means operated by the separator at the end of its return movement to release the head and permit the spring thereof to cause the head to jar the raceway.

5. In a machine of the character described, a frame having a declining tack raceway F therein and a tack separator reciprocally movable transversely of the raceway at its lower end, a striker head mounted for reciprocal movement in the direction of movement of the separator to and from its striking position and arranged to be moved by said separator, during the movement thereof in one direction, to a retracted position, a spring arranged to engage said head and to be compressed during said movement, yieldable means for retaining the head in said position against the action of said spring,

and means arranged to be engaged by the separator, at the end of its return movement, to disengage said head from its retaining means and permit the spring to actuate the head to jar the raceway.

In testimony whereof, I have signed my name to this specification.

JOSEPH SHLIEKR. 

